我的问题真的很简单......在使用该工具从头开始生成新数据库时,是否有可能通过代码优先迁移和 C# 放置默认值,如国家或标签或州?如果是的话,你能解释一下吗?
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710 次
2 回答
0
您也可以在 Seed 方法中使用原始 sql 来执行此操作。AddOrUpdate 不适用于我的场景,所以我最终这样做了:
public class Configuration : DbMigrationsConfiguration<MyContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
SetSqlGenerator(OracleConnectionInfo.InvariantName, new OracleEntityMigrationSqlGenerator());
}
protected override void Seed(MyContext context)
{
Logger.Write("In Seed method. User: " + userName);
MyInitializer.AddUpdateDataSql(context);
}
}
public class MyInitializer : MigrateDatabaseToLatestVersion<MyContext, Configuration>
{
private const string Schemaname = "MYSCHEMA";
public static void AddUpdateDataSql(Pronova2Context context)
{
DeleteTableData(context);
DropCreateSequences(context);
PopulateTypeTypeData(context);
// etc.
}
private static void DeleteTableData(DbContext context)
{
context.Database.ExecuteSqlCommand(@"delete " + Schemaname + ".T_TABLE1"); }
context.Database.ExecuteSqlCommand(@"delete " + Schemaname + ". T_TABLE2"); }
// etc.
}
private static void DropCreateSequences(DbContext context)
{
context.Database.ExecuteSqlCommand(@"DROP SEQUENCE " + Schemaname + ".T_TABLE1_SEQ"); }
context.Database.ExecuteSqlCommand(@"DROP SEQUENCE " + Schemaname + ".T_TABLE2_SEQ"); }
// etc.
}
private static void PopulateTypeTypeData(DbContext context)
{
try { context.Database.ExecuteSqlCommand(@"Insert into " + Schemaname + ".T_TYPE_TYPE (TYPE_TYPE_ID,NAME,DESCRIPTION) values (1,'TypeType1','Name 1')");
try { context.Database.ExecuteSqlCommand(@"Insert into " + Schemaname + ".T_TYPE_TYPE (TYPE_TYPE_ID,NAME,DESCRIPTION) values (2,'TypeType1','Name 2')");
// etc.
}
}
于 2013-04-23T05:57:35.783 回答
0
是的,您可以在迁移中运行原始 SQL 来插入数据:
public partial class InitialCreate : DbMigration
{
public override void Up()
{
this.Sql("INSERT ...");
}
...
}
或者,您可以在上次迁移运行后访问您的上下文,并且可以在其中插入数据:
public sealed class MyConfiguration : DbMigrationsConfiguration<MyContext>
{
public MyConfiguration()
{
this.AutomaticMigrationsEnabled = false;
}
protected override void Seed(MyContext context)
{
context.Users.AddOrUpdate(u => u.Id, this.GetMyUsers());
...
}
}
于 2013-04-20T14:35:54.867 回答